Quarterly report pursuant to Section 13 or 15(d)

Accrued Expenses (Details)

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Accrued Expenses (Details) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Schedule of Accrued Expenses [Line Items]    
Accrued compensation $ 718,262us-gaap_EmployeeRelatedLiabilitiesCurrent $ 548,953us-gaap_EmployeeRelatedLiabilitiesCurrent
Warranty reserve 209,380us-gaap_ProductWarrantyAccrual 143,364us-gaap_ProductWarrantyAccrual
Other 89,587us-gaap_OtherAccruedLiabilitiesCurrent 80,802us-gaap_OtherAccruedLiabilitiesCurrent
Accrued Liabilities, Current $ 1,017,229us-gaap_AccruedLiabilitiesCurrent $ 773,119us-gaap_AccruedLiabilitiesCurrent